Excavator.



No. 683,649. Patented act. I, 1901.

s. w Knee. EXCAVAIQR.

(Application filed Juxmv 19, 1901..

(No Model.) V 3 Sheets-Sheet I.

ATTORNEY.

No. 683,649. Patented Oct. |9o|.

a. w. KING.

0 0 o a a o o o 0 I v r o o o 0-0 0 o b WITNESSES: INVENTOR. 1 BY ATTORNEY.

n1: NURRIS 35m 00., wcrouynoq WASHINGTON. u c.

' No. 683,649. P atented Oct. I901.

a. w. KING. EXCAVAT OIK.

(Appliqaflon filed June 19, 1901.)

3Sha'eta-Shaot 3.

(No Model) WI7NESSES:

A TTORNEY.

"m: mums Pains cqv. Payne-Lima. wAsrnuuwu m c UNITED STATES PATENT OFFICE.

GEORGE W. KING, OF MARION, OHIO, ASSIGNOR TO THE MARION STEAM SHOVEL COMPANY, OF SAME PLACE.

EXCAVATO R.

SPECIFICATION forming part of Letters Patent No. 683,649, dated October 1, 1901. 7

Application filed June 19, 1901. Serial No. 65,145. (No model.)

provements in Excavators, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to excavators, and more particularly to that type of excavators known as steam-shovels, and has for its object to provide an improved construction of the dipper and its handle connections, whereby the structure may be made simpler and stronger and at the same time more durable and less subject to Wear.

To these ends my invention consists in certain novel features which I will now proceed to describe and will then particularly point out in the claims.

In the accompanying drawings, Figure l is a side elevation of a portion of an excavator embodying my invention. Fig. 2 is a front elevation of the dipper. Fig. 3 is a bottom plan view of the same. Fig. 4 is a side elevation of the dipper and its handle connections. Fig. 5 is a plan view of the same. Fig. 6 is a front elevation of the knuckle or connecting piece between the dipper and handle. Fig. 7 is a side elevation of the same. Fig. 8 is a plan view of the same. Fig. 9 is an elevation of the back of the dipper. Fig. 10 is a sec tional view of the same, takenon the line was of Fig. 9 and looking in the direction of the arrows; and Fig. 11 is a detail sectional view through one of the dipper-lugs and the adjacent portion of the dipper.

In the said drawings I have shown in Fig. 1 aportion of an apparatus in connection with which my improvements may be employed, the same consisting of a car or body 1, having a boom 2, to which is connected the dipperhandle 3, which carries the dipper 4:. It is to the construction of these two last-mentioned parts that my present invention more particularly relates, and it will be understood that those features constituting my present invention may be employed in connection with other apparatus of a similar character.

Referring now more particularly to the construction of the dipper proper, the same consists of a sheet-metal body portion 5 bent into U form to constitute the front and sides of the dipper and secured at its rear edges to a back 6 of cast metal, which will be hereinafl ter more particularly referred to. This body is provided at its inner upper edge with a,

nosepiece 7, extending around the front of the body at the top and some distance back along the sides thereof, as is usual in structures of this character. The body is also provided with teeth 8, extending above the nosepiece and downward toward the bottom of the dipper, being secured in position by rivets 9. In connection with this nosepiece I employa protecting sheet or shield 10, preferably of a thickness equal to that of the body of the dipper and extending above the same along the front and the forward part of the sides of the nosepiece 7. The teeth 8 are slotted, as indicated at 11, to embrace the nosepiece and protecting sheet, and said sheet is notched, as indicatedin dotted lines at 12 in Fig. 2, so as to extend up along the sides of the teeth above the slot thereof. This construction serves to protect the nosepiece from wear and provide a separate wearingpiece, which may be removed and renewed without requiring the renewal of the entire nosepiece or any other portion of the dipper. The notched construction also serves the purpose of resisting any lateral strain on the teeth, preventing them from being pushed sidewise and taking the strain off the rivets, by which the teeth are secured to the dipper, thus preventing their being sheared off.

The dipper is provided with the usual strengthening-bands 13 and 14. at the top and bottom on the outside thereof, and the front of the dipper is provided with protectingbars 8*, preferably of a length and width equal to those portions of the teeth 8 opposite which they lie and of a thickness about equal to the bottom band against which they abut, being secured by the same rivets 9 which secure the teeth to the body of the dipper. These protecting bars or strips are found to be quite efiective in preventing Wear ing thereon integral lugs which serve to receive the dipper-braces, the hinge'connections for the dipper-handle, and the hinge connections for the dipper-door. The lugs 15 at the top of the back serve to receive the dipper-braces, and the lugs 16 at the bottom of the back serve to receive the handle connection, while the intermediate lugs 17 receive the dipper-door hinges. The back is provided with strengthening-ribs l8 and with forwardly and rearwardly extending flanges 19, by means of which the dipper-body 5 may be the more effectually riveted to the back. By this construction aslrong dipper is obtainedatacomparativelysmall expense. The dipper-handle (indicated generally by the reference-numeral 3) comprises a body portion composed of bars 20, between which is 'located a knuckle-piece 21 in the form of a casting. (Shown more particularly in Figs. 6, 7, and 8 of the drawings.) This knucklepiece is shaped to receive the bars 20v and is .provided with lugs 22, which in conjunction with the lugs 16 on the dipper-back, between which they fit, serve to receive a pivot or pin 23, which efifects the'oonnection of the dipper to its handle. It will be thus observed that the casting 21 serves not only as a connecting means between the dipper-handle and dipper, but also as a spacing device to separate or keep apart the members or bars of which the dipper-handle is composed.

The dipper-braces, which are indicated at 24:, are connected at their forward ends to the lugs 15 on the dipper-back, while their rear ends are connected to a projection 25 on the dipper-handle. This projection is preferably form'ed on a casting 26, secured to the knuckle-piece 21, and is provided with a plurality of apertures 27, so as to permit the connection of the braces 24 to said projection by means of a pin or pins 28, inserted through an aperture in each brace and through one of the apertures 27 in the projection. Heretofore it has been customary to carry the braces down to the sides of the dipper-handle and secure them there by pins, provision for adjustment being made by providing a plurality of apertures in the braces. My improved construction above described is advantageous over this former construction, because in the first place it brings the connection higher up and farther from the hinge connection between the dipper and handle, and thereby afiords a more efficient brace. In the second place, where the adjusting-apertures are formed in the braces they must of necessity be a considerable distance apart in order to not unduly weaken the braces and are arranged in a single line, whereas in the construction above described the adj ustingapertures may be formed in the projec'tion'in twoor more rows, so as to permit a much finer adjustment of the dipper relatively to the handle without in any wayweakening the connection of the parts.

The dipper-door, which is indicated at 29,

is provided on its under side with the usual hinge-bars 30, which extend upward at the rear in a curve, as indicated at 31, and are pivoted to the lugs 17 on the dipper-back. The forward portions of these bars are riveted to the dipper-door, as indicated at 32; but their rear portions are secured to said door by straps or stirrups 33, riveted to the door and provided with loops through which the hingebars pass. This construction is advantageous, for the reason that the strain at this point is particularly severe, and it has not been practicable to insert a sufficient number of rivets through the hinge-bars at these points without unduly weakening said bars. By my improved construction I am enabled to more firmly connect the bars to the door near the rear edge thereof, employing a larger number of rivets than in the usual mode of construction without in any way weakening the bars.

I further provide for strengthening the door by means of braces 34, extending across the under side of the bottom between the hingebars 30 and having their ends flanged, as indicated at 35, to fit against the sides of the hinge-bars, so that said braces may be riveted both to the bottom-and to the hinge-bars, thus materiallystrengthening the entire bottom structure. I also provide an improved mode of adjusting the throw of the dipper-latch. This latch is shown at 36 sliding in keepers 37, secu red to the cross-braces 34 and pivoted at its rear end to an operating-lever 38, the fulcrum of which is represented by the pin 39. This pin passes through the eye 40 of an eyebolt 41, said eyebolt being threaded to fit a correspondingly-threaded lug 42 on the under side of the dipper-bottom and to receive a locking-nut 43 at the back of said lug. In Letters Patent No. 549,726, granted to me November 12, 1895, I have showna somewhat similar construction in which the eyebolt carrying the fulcrum of the latch-lever passes through an unthreaded aperture in a lug on the dippenbottom and is provided with locking-nuts on both sides thereof. I have found by experience that with such a construction grit may enter the aperture in the lug and wear away the thread of the fulcrum-bolt, thus destroying its efficiency, while at the same time the bolt is free to turn 'suihciently to permit a loosening of the locking-nuts, thus destroying the adjustment.

With the construction which I have now devised and which I have just described no such wearing of the thread is possible, since the aperture in the lug is threaded to receive the bolt, and, moreover, the loosening of the bolt after adjust ment is prevented. When it is desired to adjust-the latch, the pin 39 is disconnected and the bolt may be given a half-turn or more in either direction andsecured after adjustment by the nut 43.

In order to prevent injury to the door and its connections when the door-latch is drawn to'pe-rm-it the door to fall a'nd discharge the IIO feet the strength of the connection.

load of the dipper, I provide on the outer end of the dipper-handle a springsbuffer, against which the door may strike instead of striking against the body of the handle. This preferably consists of a frame 44, sliding in a socket 45 in the knuckle-casting 21 and provided with a spring 4'6, which forces it normally downward and outward in the path of the dipper-door. The spring is held in place by a bolt 47. It will be seen that in case the door falls with sufficient violence to throw it upward against the dipper-handle the spring-buffer above described will receive the shock of the blow and not only prevent injury to the door and handle, but also materially reduce the strain on the dipper-hinges and prevent their being broken.

In Letters Patent No. 589,565, granted to me September 7, 1897, I have set forth a mode of connection between the dipper lugs or trunnions and the body of the dipper, wherein the rivets securing said lugs pass downward through the body of the lug. I have found by experience that this not only weakens the body of the lug, but also limits the number of rivets to be used, so as to af- In my present construction (shown more particularly in Fig. 11 of the drawings) I provide in the part of the dipper to which the lugs are connected a recess 48, and each lug or trunnion (indicated at 49)is provided with a flange 50 at its base, fitting within the corresponding recess. The rivets 51, by which the lug is connected to the dipper-body, pass not through the body of the lug, but through the flange 50 and through the body of the dipper, and by reason of this construction I am enabled to employ a greater number of rivets and also rivets of less length, thus obtaining a stronger connection of the parts.

I do not wish to be understood as limiting myself to the precise details of construction hereinbefore described and shown in the accompanying drawings, as it is obvious that these details may be varied without departing from the principle of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In an excavator, a dipper provided with a body portion and a nosepiece, in combination with a separate protecting sheet or shield forming an extension of the body and covering the outer portion of the nosepiece, substantially as described.

2. In an excavator, a dipper provided with.

a body portion, a nosepiece and teeth, in combination with a protecting sheetor shield forming an extension of the body and covering the outer part of the nosepiece and notched at its edge to engage with the teeth, substantially as described.

3. In an excavator, a dipper comprising a body the front and sides whereof are formed of sheet metal, and a back of cast metal, sub stantially as described.

4. In an excavator, a dipper the body whereof comprises front and side portions of sheet metal, and a back of cast metal provided with strengthening-ribs and with flanges for connection with the sheet-metal sides, substantially as described. 5. In an excavator, a dipper having a body portion the sides and front whereof are formed of sheet metal, and a cast-metal back secured to the sheet-metal sides and provided with integral lugs for the attachment of the dipper connections, substantially as described.

6. In an excavator, a dipper having a body portion the front and sides whereof are of sheet metal, and a cast-metal back provided with integral lugs for the handle, brace and door-hinge connections, substantially as described.

7. In an excavator, a dipper provided with a door having a body portion, hinge-bars riveted thereto, and straps riveted to the door near the rear edge thereof and forming loops embracing the hinge-bars, substantially as described.

8. In an excavator, a dipper having a door, hinge-bars secured to said door and extend ing lengthwise thereof, and transverse bracebars also secured to the door and having flanged ends secured to the hinge-bars, substantially as described.

9. In an excavator, a dipper provided with a door having a latch and'an operating-lever, a projection on the door having a threaded aperture, an eyebolt threaded to fit said aperture and forming the fulcrum of the operating-lever, and a lock-nut mounted on said eyebolt, substantially as described.

10. In an excavator, the combination, with a dipper, of a dipper-handle having a body composed of bars, and a terminal casting in terposed between said bars which are secured thereto, said casting having lugs to which the dipper is hinged, substantially as described.

11. In an excavator, the combination, with a dipper, of a dipper handle to which the dipper is hinged, said handle being provided with a projection having a plurality of apertures, and a dipper-brace pivotally connected to the dipper and adjustably connected to said projection, substantially as described.

12. In an excavator, the combination, with a dipper, of a dipper-handle provided with a knuckle-casting to which the dipper is hinged, a projection carried by said casting provided with a plurality of apertures located in two or more rows, and a dipper-brace pivotally connected to the dipper at one end and having its other end adj ustably connected to said projection, substantially as described.

13. In an excavator, the combination, with a dipper having a hinged door arrangedto fall by gravity, of a dipper-handle with which said dipper is connected, said handle being provided with a spring-buffer to receive the contact of the dipper-door, substantially as described.

14. In an excavator, the combination, with a dipper provided with a hinged door arranged to drop by gravity, of a dipper-handle provided with a knuckle-casting to which said dipper is hinged, said knuckle being provided with a socket or recess, a butterfrarne sliding in said socket or recess, and a spring and retaining-bolt for said bufferframe, substantially as described.

15. In an excavator, the combination, with a sheet-metal dipper-body the front whereof is provided with teeth at its top and with a bottom band below, of protecting bars or strips extending along said front between the 'teeth and bottom band on the outside of the body of the dipper, substantially as described.

16. In an excavator, a dipper provided with a sheet-metal body portion having an exter- GEORGE w. Kine.

Witnesses F. H. KING, p GEO. A. CHENEY. 

